Hello everyone, I own a Nikon D3200 with its kit lens Nikkor 18-55 VR II. I usually take landscape photographs and I am also into astrophotography. I am thinking about buying the Tamron 18-270 VC LD version (B003) and I have some questions. Does it have an autofocus motor and would it be an improvement over my 18-55 kit?

Hi,
my D40 is in need of servicing and repair, Nikon's estimate is in the region of £170 and they have offered me a choice of upgrades to either the D3100 or D5100. From what I have read the D5100 is the better investment however I am worried about whether or not my Tamron Lens is compatible with this body.
I have a Tamron Lens AF18-270mm F/3.5-6.3 Di II LD Aspherical [IF] MACRO ( Model B003NII) -...